Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong ba cao snippets" » "cong ba code snippets", "cong bao cao snippets", "cong ha cao snippets", "cong va cao snippets", "cong bac cao snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using data snippets") or ("cong ba cao snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using data snippets") OR ("cong ba cao snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using data snippets ) or ( cong ba cao snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using data snippets") or ("cong ba cao snippets"))) or ("locating bug core snippets"))*.